Bug 2137135
| Summary: | virt-sysprep fails to mount a Oracle Linux 8 XFS image | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Virtualization Manager | Reporter: | Christopher Pereira <kripper> |
| Component: | libguestfs | Assignee: | Tomáš Golembiovský <tgolembi> |
| Status: | CLOSED DUPLICATE | QA Contact: | Lukas Svaty <lsvaty> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-10-25 12:31:22 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This bug has low overall severity and is not going to be further verified by QE. If you believe special care is required, feel free to properly align relevant severity, flags and keywords to raise PM_Score or use one of the Bumps ('PrioBumpField', 'PrioBumpGSS', 'PrioBumpPM', 'PrioBumpQA') in Keywords to raise it's PM_Score above verification threashold (1000).
BTW, the host is RHEL7. I have read that the RHEL7 kernel cannot mount a RHEL8 XFS fs, but isn't guestfish supposed to do this from a virtual environment? Besides, the RHEL8 guest is running fine on the RHEL7 host so I don't understand why guestfish won't work. Yes, this is exactly the problem. libguestfs appliance uses same kernel as host (not guest kernel) which in your case is RHEL7 version. Please refer to KB[1] article for possible resolution. [1] https://access.redhat.com/solutions/3914591 *** This bug has been marked as a duplicate of bug 1739583 *** (In reply to Tomáš Golembiovský from comment #3) > Yes, this is exactly the problem. libguestfs appliance uses same kernel as > host (not guest kernel) which in your case is RHEL7 version. Thanks. Looks like a WON'T FIX, so there is still something I don't understand: Why can't libguestfs support a different kernel (compatible with the guest) considering it's a virtual appliance (libguestfs is running inside a virtual machine, and a rhel8 VM runs fine on a rhel7 host)? When sysprep'ing a window guest on a Linux host, isn't that the case too? Well, maybe not, but anyway, a rhel7 should be able to mount and modify any guest filesystem using a compatible kernel/OS. > Why can't libguestfs support a different kernel (compatible with the guest)
> considering it's a virtual appliance (libguestfs is running inside a virtual
> machine, and a rhel8 VM runs fine on a rhel7 host)?
This is described in the KB article. It is possible to use fixed appliance from libguestfs upstream. As far as I know there is no fixed appliance distributed downstream. However, it may be tricky to convince RHV to actually use the appliance. I don't know if there is any documentation for that.
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Description of problem: virt-sysprep fails to mount a Oracle Linux 8 XFS image Version-Release number of selected component (if applicable): virt-sysprep 1.40.2rhel=7,release=10.el7,libvirt How reproducible: Easy/always Steps to Reproduce: 1. Try with OL8 image Actual results: ... check_for_filesystem_on: /dev/ol/root (xfs) command: mount '-o' 'ro' '/dev/ol/root' '/sysroot//' [ 2.104583] XFS (dm-1): Superblock has unknown read-only compatible features (0x4) enabled. [ 2.105796] XFS (dm-1): Superblock has unknown incompatible features (0x2) enabled. [ 2.105796] Filesystem can not be safely mounted by this kernel. [ 2.107599] XFS (dm-1): SB validate failed with error -22. command: mount returned 32 command: mount: stderr: mount: wrong fs type, bad option, bad superblock on /dev/mapper/ol-root, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so. inspect_os: fses: inspect_get_roots: roots: guestfsd: => inspect_os (0x1e0) took 0.52 secs virt-sysprep: error: no operating systems were found in the guest image